Press mold for dental purposes



Aug. 10 1926.

F. SACHS PRESS MOLD FOR DENTAL PURPOSES 1925 2 Sheets-Sheet 1 Filed Dec. 18

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llIll mn- Aug. 10 1926.

F. SACHS PRESS MOLD FOR DENTAL PURPOSES 2 Sheets-Sheet 2 Filed Dec. 18, 1925.

Patented Aug. I 1926.

UNITED STATES FRANZ SACHS, OF TETTNANG, GEBMA NY.

PRESS MOLD FOR DENTAL PURPOSES. 6

Application filed December 18, 1925, Serial No. 76,310, and in Germany August 18, 1924.

My invention relates to improvements in I press-molds for dental-purposes serving especially for the production of dental plate or of the whole artificial teeth made of celluloid by means of a pressing apparatus,

According to the present invention the halves of the press-mold consist each of a frame made of two parts and eing hingelike fitted together with the ends of said parts, which parts may be united by inserting a removable pivot into the bores of the hinges disposed at both sides and closed each on their outside by means of a cap or cover. The bores for the pivots and the latter themselves are correspondingly conically shaped in such a manner, that the bores of the upper frame, which taper to the bottom, are made slightly'widerthan the bores of the lower frame running also conically the same direction,so that in applying a piece of metal to the inner pivot of the lower frame the stronger pivot disposed opposite to the latter in the upper frame may be simultaneously knocked or forced out. i

It is advantageous to shift the cover or cap which closes the press-mold from below by means of dove-tailed grooves sliding on corresponding ribs rovided on two edges of the frame. arts 0 "the press form. In order to secure t e caps and the bottom in their shifted up position the grooves andribs, gripping into each other, vare shaped wedge-like to the rear, so that both parts are fixed or keyed by means of a slight'knock carried out in one direction and released again by a slight knock in the other direction.

In the drawing the subject matter of the invention is represented by two different modes of constructions.

Figs, 1 to 3 plan view, a side elevation and a vertical sectional view of one mode of construction and Figures 4: to 7 show a I second mode of construction, namely.

Fig. 4 a plan view of the frame parts,

Fig. 5 a sectional view through the cover respectivel through the bottom,

Fig. 6 an inside view of a cover or bottom, and

Fig. 7 the ri ht half in side elevation. and the left hal in section through the adjoined frame-parts of the press-mold.

According to the mode 9f construction frames are, closed in themselves.

one, slightly larger in their diameter than in the other one. As the bores a of the hinges are disposed in both frames exactly opposite one another, the pivots d situated directly one opposite to another, can beif the wider bores in-the upper frame and the narrower bores in the lower frame part are tapered to the bottom-driven out from below comparatively easily by means of.

applying a piece of metal to the thinner pivot of the lower frame without that it becomes necessary to open the press-mold. The caps or cover plates e, which are advantageously slightly hollowed out on their inner sides, fit with their edges f, possibliest exactly into the closed frames, so that any displacing of the covers during the pressing operation cannot take place. i In order to secure the proper position of the two frames upon one another, guiding pins 9 are provided on the one frame,-

which during the uniting of the parts ofthe press-mold fit intobores h of the other frame.

For the escaping of superfluouscelluloidmass during the pressing operation semicircular recesses i facing each other are provided of the frames that is to say in the edges of the lat er on .points facing each other.

The new press-molds may be produced according'to requirement, in different sizes and some of the stated measurements may be replaced by similar ones.

ina known manner on the sides Thus for instance instead of insertin the covers 0 with its edges 7 into the c osed frame they may be attached .by means of guiding pins or shifted by means of dove-v tailed grooves from the side upon the frame parts.

In the mode of construction according to Figs. 4 to 7 the press-mold also consists of the upper and lower frame parts, which are made each for itself in two parts a, b,

the same being imited with each other by means of hinges. In the like manner there is provided for the closure of the press-mold comprising two halves each consisting of a on its frontfaces a cover e and a similar shaped bottom. For the fastening of the cover respectively of the bottom e on the front faces of the upper and lower frame a of the press-mold said upper and lower frames are provided, as shown in Figs. 4 and 7, on each two opposite longitudinal edges of the upper respectively the lower front face with outwards projecting ribs in of wedge like cross section. The bottom and cover e are provided on both side edges with ledges Z, the inner face of which are provided with grooves m, which in being shifted over the ribs 70 embrace the same dove-tail like. The grooves m are slightly broadened to the rear, furthermore the ribs 7: extend itselves in getting broader to the rear, so that when the cover and bottom are shifted on the ribs, that is to say, in the direction of the broadening part, they are simultaneously solidly clamped in order to prevent the displacing of the cover respectively of the bottom in the planes of the front faces of the frame as well as the lifting off the same from the frame of the press-mold.

I claim 1. Press-mold for dental purposes especially for the production of dental plates or of the Whole artificial teeth made of celluloid by means of a pressing apparatus comprising two halves each consisting of a two part frame, the parts of which being fitted hinge-like together with its ends, said frame being enabled to be united by inserting removable pins into the bores of the hinges situated at both sides of the frame and to be closed against the outside by means of covers being fitted to the frames.

2. Press-mold for dental purposes especially for the production of dental plates or of the Whole artificial teeth made of cellulo1d by means of a pressing apparatus two part frame, the parts of which being fitted hinge-like together with its ends, said frame belng enabled to be united by inserting removable pins into the bores of the hinges situated at both sides of the frame and tobe closed against the outside by means of covers being fitted to the frames, the bores for the hinge-pins as well as said pins itselves being correspondingly slightly conically shaped in such a manner that the bores of the upper frame tapered to the bottom are made slightly wider than the bores of the lower frame running also conically in the same direction, so that after applying-a piece of metal or the like to the weaker pin, the stronger pin being situated opposite to the same in the other frame can ,be knocked or forced out.

3. Press-mold for dental urposes especially for the production 0 dental plates or of the whole artificial teeth made of celluloid by means of a pressing apparatus comprising two halves each consisting of a two part frame, the parts of which being fitted hinge-like together with its ends, said frame being enabled to be united by insertslightly wedge-like broadened to the rear together with the ribs, so that the cover and the bottom can be attached to the frame parts in such a manner as to be secured in their closing positions.

FRANZ SACHS. 

